文章转发自专业的Laravel开发者社区,原始链接:https://learnku.com/laravel/t/15077/what-is-the-n1-problem-and-how-to-solve-the-n1-problem-in-laravel 对象关系映射(ORM)使得处理数据惊人地简单。由于以面向对象的方式定义数据之间关系使得查询关联模型数据变得容易,开发者不太需要关注数据底层调用。 ORM 的标准...
关于这组方程所涉及的难题在于：我们该如何用数学理论阐明它。甚至于用数学理论解释描述奇特黑洞的爱因斯坦场方程都会比阐述纳维 - 斯托克斯方程更简单一些。人们提到的重要突破来自论文《A canonical Hamiltonian formulation of the Navier–Stokes problem》，于 4 月 1 日刊登在了流体力学领域顶级期刊《Journal of Flui...
重点单词1. problem n. 问题,难题;困难2. advice n.意见,建议;忠告,劝告3. project n.(学校的)课题,研究项目4. task n.
百度试题 结果1 题目1.问题;难题;困难n.problem 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
The N+1 Queries Problem is a perennial database performance issue. It affects many ORM’s and custom SQL code, and Django’s ORM is not immune either. In this post, we’ll examine what the N+1 Queries Problem looks like in Django, some tools for fixing it, and most importantly some...
人们提到的重要突破来自论文《A canonical Hamiltonian formulation of the Navier–Stokes problem》,于 4 月 1 日刊登在了流体力学领域顶级期刊《Journal of Fluid Mechanics》上: 论文链接:https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/canonical-hamiltonian-formulation-of-the-navier...
The N+1 query problem is a common performance antipattern. It looks like this: $cats = load_cats(); foreach ($cats as $cat) { $cats_hats = load_hats_for_cat($cat); // ... } Assumingload_cats()has an implementation that boils down to: ...
百度试题 结果1 题目1.问题;难题;困难n.problem 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
【解析】1.【答案】solve 【解析】solve the problem解决问题,solve动 词,解决;例:He is trying to solve the proble m.他正在努力解决这个问题。 2.【答案】doing 【解析】have problems doing sth.做某事有困 难,例:I have problems doing my homework. 我做家庭作业有困难。 3.【答案】riding 【解析】...
#考研英语# problem n.问题,疑难问题思考题,讨论题 procedure n.程序,手续,步骤 proceed v.进行,继续下去发生 proceeding n.行动,进行,(pl.)会议录,学报 process n.过程,进程工序,制作法工艺 v.加工,处理 proces...